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Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 221,704 | $ 221,704
Accumulated Amortization | (163,257) | (134,053)
Total | 58,447 | 87,651
Developed core technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 136,145 | 136,145
Accumulated Amortization | (102,449) | (81,951)
Total | 33,696 | 54,194
Customer relationships/contracts [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 67,098 | 67,098
Accumulated Amortization | (48,150) | (42,142)
Total | 18,948 | 24,956
Trade names and trademarks [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 11,361 | 11,361
Accumulated Amortization | (9,145) | (7,700)
Total | 2,216 | 3,661
Maintenance agreements and related relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 7,100 | 7,100
Accumulated Amortization | (3,513) | (2,260)
Total | $ 3,587 | $ 4,840

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